"They were thinking they were going to be in Europe so they brought in players that would supplement the squad who had played European football".
The Gunners have also struggled in all competition as they have just won one of their last six Premier League appearances and are out of the Champions League. "We were good on the ball and breaking their rhythm, but last 15 minutes of the first half we started to lose the ball very quick and if you give them that quantity of attacks they're very quick to close to your goal".
"But they scored the second one, after that it's very risky to play against them, because they let you create".
While Arsenal appear to have turned a corner, the defeat for West Ham marked a fifth straight loss as Slaven Bilic's side continue to fall deeper into the fight for top-flight survival.
But Walcott made it 2-0 in the 68th minute, Ozil supplying the cross from the left after a neat one-two with Sanchez.
Welbeck then lashed wide from a tight angle before a lull in the game which lasted nearly until half-time, when the hosts finally started to up the tempo.
Arsenal managed to grab their first Premier League win since February, thanks to second-half goals from Ozil, Walcott and Giroud.
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But Ozil, Wenger's record signing for Arsenal in 2013, has lent his support to the manager and feels he deserves more respect. The football player is happy to stay in London with a winning team, and hopes to finish his contract there.
"We started the game really well", he said. However it does appear as though Michail Antonio is back in contention to play some part in North London. At the moment, I think he has a scan today and we'll know much more tomorrow.
The Hammers were beaten 3-0 at Arsenal on Wednesday in their latest setback and face a critical home fixture against fellow relegation candidates Swansea City on Saturday.
"It's a good result tonight and a relief as well because we have gone through a bad period".
"In the first half we did OK, not only because of them but because we were good".
But it was Randolph who would be at fault for Arsenal's opener just before the hour mark as Fonte's poor clearance fell to Ozil, whose strike from the edge of the box squirmed through the grasp of the West Ham goalkeeper.
"We know deep down that we have to forget about that as quickly as we can and get a win on Saturday".